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Open Racket: Andy Murray, John Isner, Tennis Tales

Aug. 26, 2014 9:15 p.m. ET

Where Tension Is High

Pro tennis players can churn through multiple rackets during a match. Sometimes a string pops. Sometimes the tension feels off. Sometimes they just need to switch it up. Or they might smash a frame in frustration.

Since 2006 at the U.S. Open, a team of trained pros has been the answer to these woes, stringing rackets on the quick for players who need them. On Monday, they strung 448 rackets. Including the days before the tournament began, they've surpassed 2,400 rackets this year.